package org.foreningsgatan.modular.common.manual;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferedImage;

import org.foreningsgatan.modular.common.frame.DisplayImage;
import org.foreningsgatan.modular.common.primitive.Interpolation;
import org.foreningsgatan.modular.common.primitive.RandomUtils;

/**
 * 
 * Copyright (c) 2008 Joakim Back
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 * 
 * @author Joakim Back
 * 
 */
public class DisplayNoise {
	private static final int sWidth = 800;

	private static final int sHeight = 200;

	private static final int sSignalStrength = sHeight;

	private static final int sLength = 30;

	public DisplayNoise() {
		double[] vNoise = RandomUtils.randomDoubles(sLength);

		BufferedImage vImage = new BufferedImage(sWidth, sHeight,
				BufferedImage.TYPE_INT_RGB);

		Graphics g = vImage.getGraphics();
		g.setColor(Color.RED);

		double vProgress, vInten;
		int y, oy = (sHeight / 2);
		
		for (int x = 0; x < sWidth; x++) {
			vProgress = (double) x / sWidth;
			vInten = Interpolation.getCosine(vNoise, vProgress * sLength);

			y = (sHeight / 2)
					+ (int) Math.round((vInten - 0.5f) * sSignalStrength);

			vImage.getGraphics().drawLine(x - 1, oy, x, y);

			oy = y;
		}

		new DisplayImage(vImage);
	}

	public static void main(String[] args) {
		new DisplayNoise();
	}
}
